CVE-2026-41847 PUBLISHED

Spring Framework Security Filter Bypass in WebFlux Kotlin Router DSL

Assigner: vmware
Reserved: 22.04.2026 Published: 09.06.2026 Updated: 09.06.2026

Spring WebFlux applications may be vulnerable to a security bypass when using the Kotlin Router DSL.

Affected versions: Spring Framework 5.3.0 through 5.3.48.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS Score: 4.8

Product Status

Vendor Spring
Product Spring Framework
Versions Default: unaffected
  • affected from 5.3.0 to 5.3.49 (excl.)

References

Problem Types

  • CWE-284: Improper Access Control CWE

Impacts

  • Security-related modifications applied to a ServerRequest by a filter in the WebFlux Kotlin Router DSL are silently discarded, causing security enrichment to have no effect and allowing security bypass.